Abstract

A sample of toluene-soluble extract from brown coal or lignite obtained by the procedure describes in ISO 975 is extracted with acetone at a temperature of 18 to 22 °C. The soluble fraction is filtered or centrifuged off and after evaporation of the solvent dried to constant mass. The percentage of acetone-soluble material is calculated from the mass of reidue after drying.


General information 

  • Status
     :  Withdrawn
    Publication date
     : 1985-12
  • Edition
     : 2
    Number of pages
     : 2
  • Technical Committee
     : ISO/TC 27/SC 5 Methods of analysis
  • ICS
     :
    73.040 Coals

Life cycle


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